Abstract: An acetabular cup prosthesis comprising: an inner cup surface and an outer cup surface, said inner cup surface meeting said outer cup surface at a rim of said cup, wherein said inner cup surface, said outer cup surface or both said inner cup surface and said outer cup surface comprises an engagement formation located proximal to said rim, said engagement formation extending around at least a portion of the circumference of the cup; and a Sip member comprising an engagement formation configured to cooperate with the engagement formation of the cup.

Abstract: A cup prosthesis includes a cup, a band disposed about the outer circumference and adjacent to the rim of the cup, an impaction cap disposed at least partially within the space defined by the inner surface and the rim of the cup, and at least one flange extending from the band connected on one end to the impaction cap.

Abstract: In a prosthetic ankle joint, a first component has a lower articular bearing surface and is configured for connection to the distal end of the tibia such that the lower articular bearing surface is remote from the tibia. A second component has an upper articular bearing surface and is configured for connection to the tarsal bone such that the upper articular bearing surface is remote from the tarsal bone. A third component is interposed between the first and second component and has an upper bearing surface configured to be slidable on the lower bearing surface of the first component and a lower bearing surface configured to be slidable on the upper surface of the second component. At at least one of the components and/or bearing surfaces is configured to allow the third component to be slidable in an anterior/posterior direction but to prevent the third component being slidable in a medial/lateral direction.

Abstract: A cap used during the insertion of an acetabular cup prosthesis. The cap includes impaction plate having an upperside and an underside. The impaction plate includes a plurality of separate sectors mutually connected at a connection point on the impaction plate by flanges. Each sector includes interlocking elements which in use enable the impaction plate to be connected to an introduction tool. The cap also includes at least one lug extending downwardly from the underside of each sector. The lug is located at the portion of the underside of the impaction plate which will in use enable the lug to be interconnected with a corresponding recess on an internal wall, an external wall or a rim of a prosthesis.

Abstract: An acetabular cup prosthesis having a rim and comprising a metal band applied around the outer circumference of the acetabular cup prosthesis and adjacent to said rim, said cup prosthesis additionally comprising one or more flanges extending from the metal band and being configured such that in use the or each flange connects the prosthesis to an impaction cup.

Abstract: A tibial prosthesis has a metal tray component (1) comprising a transverse member (3) with a peripheral upstanding rim (6) and a projecting stem (4). The upstanding rim (6) includes a posterior rim portion with an undercut lip forming a pair of recesses (7, 8) and an anterior rim portion with an open angled posterior surface portion (9) and a posteriorly projecting barbed portion (10). The prosthesis also includes a tibia insert (2) made of a plastics material which fits on the tibial implant (1) within the upstanding rim (6) and has on a posterior portion thereof a shaped contour (14, 15) adapted in use to fit snugly under the undercut lip and on an anterior portion thereof an anterior surface (13) having a taper angle substantially corresponding to the angle of the open angled posterior surface portion.

Abstract: A tibial prosthesis is described comprising a metal tray component (1) comprising a transverse member (3) having an upper side with a peripheral upstanding rim (6) and a lower side provided with a projecting stem (4) for insertion in a surgically prepared cavity in a tibia of a patient. The upstanding rim (6) includes a posterior rim portion and an anterior rim portion. The posterior rim portion is provided with an undercut lip forming a pair of recesses (7, 8) and the anterior rim portion has an open angled posterior surface portion (9) and a posteriorly projecting barbed portion (10). The prosthesis also includes a tibia insert (2) made of a plastics material shaped to fit on the upper side of the tibial implant (1) within the upstanding rim (6) and having an upper bearing surface (11, 12) adapted to cooperate with at least one condyle of a femur or of a femoral implant and a lower surface.

Abstract: The invention relates to a prosthetic implant comprising a main body portion having a first surface for presentation to a receptive bone surface or into a bone cavity and a second surface for receipt of an articulating joint, and means on the implant adapted for attachment of a filamentary member, such as a cable. The invention also relates to a surgical tool for gripping the implant, comprising an elongate body having a first end surface for bearing on the prosthetic implant and means for attachment of the tool to the implant, directly or indirectly by means of the cable.

Abstract: An endoprosthetic bone joint device, particularly suitable for a finger or toe joint, comprises two cups and a ball or other roller freely located in and between the cups in articulatory engagement. Normally the cups do not wholly encompass the ball, and so allow flexion-extension simulating articulation limited by mutual abutment of relevant portions of the cup rims. For this purpose, at least one of the cup rims is contoured from planar form to provide two mutually-inclined, diametrically-opposed stop surfaces. Various requirements for abduction-adduction function simulation can also be accommodated by curved profiling of said one cup rim between its stop surfaces.

Abstract: A powered saw developed for use in orthopaedic surgery has a strip-form blade carrier projecting from a casing in which it is driven at its inner end in an orbiting manner while further towards the carrier free end the carrier is constrained to allow longitudinal translation and pivotal movement. In consequence, the free end of the carrier, and all points of a blade projecting therefrom, are also subjected to an orbital motion. By appropriate location of teeth the blade can therefore cut in any combination of both sideways directions and also at its tip, and preferably has non-symmetrical teeth which are all raked in the same sense around the edge of the blade.

Abstract: An endoprosthetic bone joint device for the talo-navicular joint comprises two generally similar components each of disc form with one face curved to define a bearing surface and the other face provided with an elongated, relatively shallow, relieved configuration extending across the latter face, the components differing by having complementary bearing surfaces of respectively convex and concave shape. The bearing surface shapes are suitably spherical and the relieved configurations provided by a longitudinally tapered rib with undercut side faces. In use, the joint is approached from above, the bones formed with downward slots to receive the component ribs by translation, and the components with convex and concave bearing surfaces respectively cemented to the talus and navicular.